- Published: January 2002
- REF/ISBN: IP462P2-34869
Overview:
Scope
This standard specifies two calculation procedures ("method A" and "method
B") for PCB content. The basis for this quantification is taken from the
chromatographic results of EN 12766-1:2000 in which all necessary experimental
procedures are described for the specific analysis of unused, used and treated
(e.g. dechlorinated) petroleum products including synthetic lubricating oils and
mixtures of vegetable oils. The method is also applicable to petroleum products
and synthetic lubricating oils suitably recovered from other materials, e.g.
from waste materials. Both methods have different strengths and weaknesses which
are described in the next paragraphs and which must be considered before use in
a specific application. Proper application of either method A or method B needs
to be carefully considered before use in a specific application.
Using method
A, special care needs to be exercised to avoid interferences from non PCB
substances which may occur in the chromatogram. Therefore, method A can be used
predominantly for the analysis of used and unused insulating oils. It is
recommended not to use calculation method A without special precautions for
other than above-mentioned products. Calculation method A can produce two
alternative sets of results, ("All Probables" and "All Possibles"). Therefore,
care needs to be taken in order to interpret these results in the correct
manner.
Method B uses as intermediate result the sum of six congeners, which belong to the most abundant in almost all technical PCB materials, thereby minimizing potential interferences from other (coeluting) non PCB substances. To obtain the PCB content, the intermediate sum from six congeners needs to be multiplied by a multiplication factor. Calculation Method B can be used predominantly for the analysis of liquids from used and waste materials of unknown origin and for samples with low PCB contents.
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